What am I doing wrong....?
GoPro 9 (5K 24fps) with HEVC codec cannot be used in After Effects.. 2020 ver 17.1.3
...vsni file unsupported or corrupted"
Solved my own problem!
Insta360 plugin bundle needs to be removed..
Seems Insta has written a bug into its Adobe plugin bundle that cripples AE when you want to import GoPro footage!!!!
Great to know that the issue has been resolved, @capediver. Thank you for sharing the solution.